Carbureter.



H. M. COULTER.

GARBURETER.

APPLICATION FILED JAN: 31, 1914..

1,125,069, Patented Jan. 19, 1915.

s'rarns r gniixitr oniuon HARRY M. GOULTER, OF SPRINGFIELD, MASSACHUSETTS.

CARBURETER.

aZZ whom z't may mm: N.

,Be it known that I, HARRY CoULTER,

,This invention relates to carbureters and moreparticularly to devices for regulating the amount of. fuel delivered thereto. 'An object of the invention is to provide a carbureter with improved interconnecting ;means between the controlling-mechanisms for the air and the fuel. As the fuel supply .is throttled, so also is the supply of air, since the controlling devices are made to operate in unison. I Another object is to provide simple mechanism by means of which the supply of fuel can be quickly and uniformly varied from a delicate minimum to a maximum over a wide range. 1 A further object is to provide means to adjustthe fuelsupplv independently of the mechanism above mentioned. WVhile the above mechanism checks the flow of' fuel as the-air supply is throttled, it is desirable -to provide improved means to adjust the .fuel supply independently to provide for -.variations in atmospheric conditions.

- Other objects of the invention will appear in the detailed description and annexed claims.

The embodiment of my invention chosen for the purpose of illustration is shown in the accompanying drawings.

.' Figure l is aside elevational view of my .im'proved carbureter, Fig. '2 is a sectional side elevation thereof, Fig. 3 is a sectional .plan view taken on the line 33 of Fig. 1 and looking in the direction of the arrow, Fig. 4 is a sectional view of the fuel nozzle ,of my carbureter, and Fig. 5 is a dismembered perspective view illustrating the nozzle and the adjusting device therefor.

I Referring to the drawings, a is the usual :carbureter pipe casing, open to the air at thebottbm and connected from the top by (pipe to the manifold of the engine in the 'c'om'monmanne'r. Shutters or dampers d and e, rotatably mounted on transverse shaftsc and b, respectively, swing within Specification of Letters Patent.

Application filed January 31, 1914. Serial No. 815,659.

pipe at and vary the supply of air, allin the ordinary manner. These dampers d and e are connected by bellcranks j and g and link 2' to move in unison. The shaft b is also provided with an operating lever f, keyed to shaft 6 and rotatable between the stops f to move. the shutters d and 6. So far, what I have described is substantially ,old and is common practice in the art.

The novel features of my invention will now be described. Between the shafts b and c and parallel therewith, I provide a sleeve Z rotatably mounted in the wall of the pipe a. Fixed to the sleeve Z is a bell crank it operated by a link it from the link 9 connected to lever f. The sleeve Z is provided with a substantially triangularly shaped notch or slot Z, widest at the end of the sleeve Z and gradually tapering to a point as it nears the wall of pipe a. This slot isv preferably cut with one edge parallel to the axis of the sleeve as shown and the other edge in the form of a curve tapering toward and meeting the first edge at its inner end. Rotatably mounted in the wall of pipe a and within the sleeve Z is a nozzle m and fixed to an extension of the latter is an operating levern. The nozzle m is provided with a horizontal inlet hole pnear the bottom thereof, and leading-from hole p to thepe riphery of the nozzle m are a number of small vertical holes which may be of various diameters. The nozzle m is mounted in suitable stuffing boxes to prevent leakage of the fuel, and a supply-plpe 0 communicates through a recess in the stuffing box to the hole 2 in the nozzle, as shown in Fig. 3.

In operation, gasolene-orother liquid fuel enters through the su ply-pipe 0 into the hole 77 of nozzle m and issues fromtheiapvertures q in the form of spray. The jetting action is aided by the length of holes a forming the outlet for fuel from the inlet hole 79. Assuming that the shutters d and e are wide open, to permit the maximum supply of air tothe carbureter, then the sleeve 100 Z is normally 'positioned'on the nozzle m -toallowthe notch Z to register with all the apertures q. Thus, the maximum supply of fuel is obtained with the maximum amount pers d and e, the sleeve Z is rotated thereby, due to the connections g, h, and is. As the sleeve Z turns, the notch Z passes out of registration with some of the apertures g, and the fuel supply is decreased. A sufficient arc of rotation will finally close. all but a single aperture 9. It is to be noted particularly that only a very small angular movement of the sleeve is necessary to vary the fuel supply from the minimum to the maximum. Furthermore, by the proper disposal of a suflicient number of apertures g the fuel may be made to vary uniformly and properly in proportion to the air supply.

To secure proper carburation, mechanism is preferably provided to vary the fuel supply, independently of the air supply, to provide for variations in atmospheric conditions. ll obtain this result by moving the operating lever n, thereby rotating thevnozzle m relatively to the sleeve Z. A certain number of apertures 9 may thus be closed even when the dampers d and e are set for the maximum air supply.- lhis will decrease the richness of the mixture since the normal condition of the apparatus is adjusted to atmospheric conditions. By rotating the nozzle m in the opposite dlrection, a richer mixture may be obtained since a certain number of apertures 9 will then remain uncovered by the sleeve Z when the dampers are set for the minimum air supply. Thus, I have provided, m a carbureter, improved devices to vary the fuel lntake 1n roportion to the air intake. Furthermore, have supplied improved mechanlsm to increase or decrease the richness of the mixture according to atmospheric or other conditions. Moreover, my inventlon comprises simple, easily-operable mechanism which is applicable to the ordinary carbureter and which rovides a desired delicate ad ustment of fuel throughout a wide range.

What I claim is 1. In a carbureter, the combination witha casing, of means to vary the su ply of a r to said casing, a sleeve rotata le m sa d casing and operably connected with said means, said sleeve having a notched portlon, a nozzle extending into said sleeve and rotatable independently thereof, means to convey fuel to said nozzle, said nozzle having a plurality of apertures adapted to be successively o ened by said sleeve.

2. A car ureter, having in combination, a mixing chamber, a fuel inlet means therefor, a series of separate openings from said means, a rotatable controlling device for said openings arranged to successively cover and uncover said openings, an air inlet controlling means for the chamber operably connected to but otherwise independent of said device, and means successively to cover and uncover said openings without movement of said rotatable controlling device.

maaoee 3. A. carbureter, having in combination,

a mixing chamber, a fuel inlet means therefor, comprising a pipe member extending across the path of the air passing therethrough having a longitudinal fuel passage at some distance from its top surface, and a series of small vertical passages leading from the longitudinal passage to the top surface, together with means to successively open and close said vertical passages as desired, said means and said pipe being adjustable. one with relation to the other so that a given movement of said means will open a more or less number of the vertical passages, and means, operable independently of said first Ira'med means to successively openf'and close said vertical passa es.

4. At'carbureter, having in com ination, a mixing chamber, a fuel inlet means therefor, comprising a cylindrical pipe member extending transversely of the chamber having a longitudinal fuel passage at some distance from its top surface, and a series of small vertical passages leading from the longitudinal passage to the top surface, a rotatable sleeve arranged to fit over said pipe member having a slot provided therein with one edge of the slot at an angle to the axis thereof, means to adjust the sleeve around the pipe member, whereby the vertical passages are successively opened and closed.

5. A carbureter, having in combination, a mixing chamber, a fuel inlet therefor, comprising, a cylindrical pipe member extending transversely of the chamber having a longitudinal fuel passage at some distance from its top surface and a series of small vertical passages leading from the longitudinal passage to the top surface, a rotatable sleeve arranged to t over said pipe member and having a slot provided therein with one edge of the slot at an angle to the axis thereof, means to adjust the sleeve around the pipe member, whereby the vertical passages are successively opened and closed, means to adjust the pipe member with relation to said sleeve to determine the number of holes which a given movement of the sleeve will cover and uncover.

6. A carbureter, having in combination, a mixing chamber, distanced valves therein to control the passage of air therethrough, a fuel inlet arranged between said valves, comprising, a pipe extending transversely across the passage of the air through said chamber, a series of small openings extend ing from the upper surface of said pipe member through which fuel is adapted to be sprayed, a rotatable sleeve arranged to fit are the position of the sleeve, means to adtermine the number of open' 5 uncovered just the pipelmembei'1 angularly (vivithdrelabv a given movement of said 3 eeve. tion to t e s eeve, a constructe an arranged so that a given movement of the air- HARRY COULTER' 5 valve will open a given number of small Witnesses:

openings in the pipe member, and the angu- H. E. HARTWELL, lar adjustment of the pipe member will de- F. G. NEAL. 

